PET - poly (ethylene terephthalate) - bottle surfaces were exposed to chemical agents and evaluated with middle infrared spectroscopy (MIR) and near infrared hyperspectral imaging (HSI-NIR). Images (9
β-estimates and p-values are listed only for variables with a significant impact on ΔSH;[Ca] and [Pi]: calcium and phosphate concentrations, respectively;ns = not significant.Multiple linear regressio
